[joe_the_user]

I'm not seeing any references to the accuracy or inaccuracy of the test. They mention a severe case that's negative should be re-tested and that samples from the lower respiratory tract are better.

That is the thing. This discussion started around whether the CDC should have created their test and the claim was the CDC's actions were a response to the inaccuracy of the WHO test. But part of the accuracy of any test is whether the virus in a location at all - if the virus is, say, only in a person's lungs, any test will have trouble using blood or spit.